I am presuming,
@InnoGames, that deciding to put old artefacts in as spire prizes on 6 week rotations must have followed a degree of analysis of the player base. I say this because the percentage of players receiving 9 artefacts in 6 weeks must be negligibly small. I won't even attempt this maths, because I know there are several variables to consider, including ones I don't have the numbers on, i.e. number of people who complete the spire (or average progress through the spire), number of people who play it at all, plus the likely number of artefacts to be won.
If I were to take a guess then I would imagine less than 1% of players win all 9 artefacts in the 6 weeks. Out of that small number I would take the educated guess that a healthy proportion were playing the game at the time of the original event, as people completing the spire each week are probably more likely to be more established players (just an assumption of a general likelihood.)
The point here is that the number of people winning 9 artefacts who actually have any use for 9 artefacts must be such a small number as to not even register as a factor.
Therefore, other than the above, the only people who will be interested in this idea are those people who have pre-existing semi-evolved buildings. Any of those people would happily accept an extra few artefacts to complete their buildings.
I know that I am covering old ground that I myself have gone over several times... probably in this same thread... but the point of my post,
@InnoGames, is that if you took the decision to launch this particular initiative, then you must first have looked at the number of players who are currently active in the game and who have the building already which isn't already at level 10. It occurs to me that the number of people in this second group are probably even smaller than those in the first, but you must have familiarised yourself with this number... right?
If I'm right, then I ask again - Why?
This is to solve the issue with the Spire Library Set, but not only does it not solve it at all (people with multiple sets still have multiple sets and other players can no longer narrow the gap), but it also generates a growing number of disgruntled players like
@Sigyn, who have lost the Spire Set and nothing worthwhile has replaced it.